Silicone rubber refers to土遠 the main chain is al關白ternately composed of silicon and o河著xygen atoms, silicon atoms are usua舞明lly connected with two org場下anic groups of rubber. Ordinary 員火silicone rubber is mainly compos門醫ed of silicon chains風不 containing methyl groups草白 and a small amount of錢她 vinyl. The introduction of phe媽藍nyl can improve the high and low te麗爸mperature resistance of silica ge紅歌l, and the introduction of森花 trifluoropropyl and cyanide ca睡媽n improve the temperature and o月的il resistance of silica 土廠gel. Silicone rubber has good lo商拍w temperature resistance and can玩內 still work at -55 ° C歌分. After the introduc匠他tion of phenyl, it can reach -73℃.些黃 Silicone rubber also has heat resista了少nce. It can work for a l村生ong time at 180 ° C, and can withstand睡音 a few weeks or more at 200 請呢° C. It is also flexible, an畫低d it can instantly wit刀厭hstand high temperatures ab城要ove 300 ° C. The perme一體ability of silicone rubber is 輛城good, and the oxygen permeability is be說河tter in the synthetic polyme兒一r. In addition, silicone rubber also姐木 has the outstanding characte坐事ristics of physiological inerti和長a and does not cause coagu相讀lation, so it is widely used in the med話在ical field.
The main performance is as follows:
First, low temperature performance:厭山 the glass transition te路國mperature of silicone rubber月花 is generally -70 ~ 50 ° C,器從 and special technol上作ogy can reach -100 ° C, indicat書冷ing that its low temp什可erature performance is excellent. Thi服購s is of great significa月房nce to the aviation and aerospace indu女門stry.
Second, high temperature performance:著請 silicone rubber is characterized by hi文器gh temperature stability. Although th鐵到e strength of silicon日跳e rubber at room temperature is the mos也放t natural rubber or h城校alf of some synthetic ru金銀bber, but at high te林聽mperatures above 200 ° C, silicone ru事開bber can still mainta你吃in a certain flexibility, elas就笑ticity and surface hardness, a離弟nd its mechanical properties ha人還ve not significantly ch農跳anged.
Third, weather resistance:相來 the silicone silicone bond in silic劇身one rubber is very s地河table to oxygen, ozone a低黑nd ultraviolet light, and has excell拿也ent weather resistance但費 without adding any additives.
Physical and mechanical properties: 草媽the physical and mechanical propert又那ies of silicone rubber at room 唱腦temperature are worse than ord頻在inary rubber, but at 15兒店0 ° C high temperature a在微nd -50 ° C low temperature, its暗間 physical and mechanical pro著公perties are better than ordi司購nary rubber.
5. Oil and chemical resista器討nce: Ordinary silicone rubber has med事看ium oil resistance and solven小工t resistance.
Six, electrical performance: s他這ilicone rubber has excellent媽視 insulation properties, c一計orona resistance and arc resistance is報玩 also very good.
Seven, physiological inertia: silico是飛ne rubber is non-toxic,少大 tasteless, odorless, does not adhe事個re to human tissues, has an antico多離agulant effect, and 物了has a small reactivity to human ti理市ssues. Especially suitable for us女金e as medical materials.
Gas permeability: At roo吃舞m temperature, the permeability of si話呢licone rubber to air, nit就電rogen, oxygen, carbon dioxide and o有生ther gases is 30 to 50 times 明媽higher than that of natural r月體ubber.
Silicone rubber wire 湖了is suitable for connecti懂那ng cables of fixed lin畫熱e or mobile electrical綠司 appliances with rated AC voltage of熱月 0.6/1KV and below. Th的窗e product has the characteris相鐵tics of high temperat要懂ure resistance, cold 能技resistance, softness and so on. The雜新 cable has soft struct外師ure, convenient heat dissipa離志tion, stable electrical performan畫少ce in high temperature (high了關 cold) environment, outstanding aging門睡 resistance and long service跳廠 life. Products are widely 如匠used in metallurgical industry來遠, power engineering, petrochemical愛理, electronic devices, automotive i煙少ndustry and other manufacturing indu術劇stries. Silicone rubber 暗外control cables are suitable for 450/75什對0 volt AC ratings an票行d for laying mobile or fixed e雜科quipment. The cable has the ad小劇vantages of high flexibility, 開新high temperature resistance and vo熱家ltage resistance.
